Question

When Aa hybrid is crossed back with the homozygous dominant parent, the phenotypic ratio of the progeny will be ______.

Options

• 3 : 1

• 1 : 2 : 1

• all would resemble the dominant parent

• 2 hybrid : 2 recessive

Answer 1

When Aa hybrid is crossed back with the homozygous dominant parent, the phenotypic ratio of the progeny will be all would resemble the dominant parent.

Explanation:

Aa × AA produces AA and Aa offspring. Both genotypes show the dominant phenotype, so all progeny resemble the dominant parent.